Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Bera, Apurba"'
With the uGMRT having unprecedented sensitivity and unique capability of providing instantaneous frequency coverage of 250$-$1460 MHz, we studied ${\rm FRB}\,180916.J0158+65$ over four months sampling during its active phase. We report the detection
Externí odkaz:
http://arxiv.org/abs/2409.20307
Autor:
Hoffmann, Jordan, James, Clancy W., Qiu, Hao, Glowacki, Marcin, Bannister, Keith W., Gupta, Vivek, Prochaska, Jason X., Bera, Apurba, Deller, Adam T., Gourdji, Kelly, Marnoch, Lachlan, Ryder, Stuart D., Scott, Danica R., Shannon, Ryan M., Tejos, Nicolas
Fast radio bursts (FRBs) are transient radio signals of extragalactic origins that are subjected to propagation effects such as dispersion and scattering. It follows then that these signals hold information regarding the medium they have traversed an
Externí odkaz:
http://arxiv.org/abs/2408.05937
Autor:
Bera, Apurba, James, Clancy W., Deller, Adam T., Bannister, Keith W., Shannon, Ryan M., Scott, Danica R., Gourdji, Kelly, Marnoch, Lachlan, Glowacki, Marcin, Ekers, Ronald D., Ryder, Stuart D., Dial, Tyson
Fast radio bursts (FRBs) are brilliant short-duration flashes of radio emission originating at cosmological distances. The vast diversity in the properties of currently known FRBs, and the fleeting nature of these events make it difficult to understa
Externí odkaz:
http://arxiv.org/abs/2406.13704
Autor:
Dutta, Saili, Bera, Apurba, Bait, Omkar, Narayan, Chaitra A., Sebastian, Biny, Vaddi, Sravani
Blueberry galaxies (BBs) are fainter, less massive, and lower redshift counterparts of the Green pea galaxies. They are thought to be the nearest analogues of the high redshift Lyman Alpha (Ly$\alpha$) emitters. We report the interferometric imaging
Externí odkaz:
http://arxiv.org/abs/2406.08341
Star-forming galaxies are believed to replenish their atomic gas reservoir, which is consumed in star-formation, through accretion of gas from their circumgalactic mediums (CGMs). However, there are few observational constraints today on the gas accr
Externí odkaz:
http://arxiv.org/abs/2309.05937
Publikováno v:
The Astrophysical Journal Letters, 2023, 950, L18
The atomic hydrogen (HI) properties of star-forming galaxies in the local Universe are known to correlate with other galaxy properties via the ``HI scaling relations''. The redshift evolution of these relations serves as an important constraint on mo
Externí odkaz:
http://arxiv.org/abs/2305.01389
The neutral atomic hydrogen (HI) mass function (HIMF) describes the distribution of the HI content of galaxies at any epoch; its evolution provides an important probe of models of galaxy formation and evolution. Here, we report Giant Metrewave Radio
Externí odkaz:
http://arxiv.org/abs/2210.17018
Publikováno v:
ApJS 264 47 (2023)
The dynamics and the structure of the solar corona are determined by its magnetic field. Measuring coronal magnetic fields is, however, extremely hard. The polarization of low-frequency radio emissions has long been recognized as one of the few effec
Externí odkaz:
http://arxiv.org/abs/2209.06666
Radio emission from a decade old Type I superluminous supernova, PTF10hgi: Comparison with FRB121102
We perform a comparative study between the only radio detected Type I superluminous supernova (SLSN) PTF10hgi, and the most active repeating fast radio burst FRB121102. This study has its root in the hypothesized FRB-SLSN connection that states that
Externí odkaz:
http://arxiv.org/abs/2008.11375
Autor:
Bera, Apurba, Chengalur, Jayaram N.
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters, 2019, 490, 1, L12-L16
We present statistical analysis of a fluence limited sample of over 1100 giant pulses from the Crab pulsar, with fluence > 130 Jy ms at ~1330 MHz. These were detected in ~260 hours of observation with the National Centre for Radio Astrophysics (NCRA)
Externí odkaz:
http://arxiv.org/abs/1909.13812